Azo dyes are prepared from which of the follo | vedclass

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(A) Azo dyes are prepared from aniline. First,aniline $(C_6H_5NH_2)$ reacts with $NaNO_2$ and $HCl$ at $273-278 \ K$ to form benzene diazonium chlorid

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Aniline

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(A) Azo dyes are prepared from aniline. First,aniline $(C_6H_5NH_2)$ reacts with $NaNO_2$ and $HCl$ at $273-278 \ K$ to form benzene diazonium chloride $(C_6H_5N_2^+Cl^-)$. This benzene diazonium chloride then undergoes a coupling reaction with phenols or aromatic amines to produce azo dyes,which are characterized by the $-N=N-$ linkage.

Azo dyes are prepared from which of the following?

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